5.2 热电阻的标称电阻值 R≥1.414*E/Im

Nominal resistance values of thermal resistance R≥1.414 * E / Im

E 为线路电压

E is the line voltage Im为浪涌电流 Im a surge current 一般来讲

对于开关电源 转换电源 不间断电源 逆变电源等

Im=100 倍工作电流对于灯丝加

热器等的电路

Im=30 倍工作电流

In general, the switching power supply, switching power supplies, uninterruptible

power supplies, power inverter and other times operating current Im = 100For the

filament heater circuit like Im = 30 times the operating current.

5.3 B 值越大，残余电阻越小，工作时温升越小。

B The larger the value, the smaller the residual resistance, the smaller the

temperature rise during operation.

5.4 热时间常数和耗散系数两者为互为依赖的关系，并不是说某一个数值越大越好或越

小越好，而是两者的乘积越大说明热敏电阻的热容量就越大，那么抗浪涌电流的能力

就越强。

Thermal time constant and dissipation factor as both mutually dependent relationship, not

tosay that one or the greater the value, the better the smaller the better, but the product of

the two greater the heat capacity of the thermistor greater, then resistance to surge current,

the stronger

5.5 热敏电阻用于电源电路时主要是用来抑制开机时的大浪涌电流，大的浪涌电流是电

容放电产生，所以电路中所要安装的滤波储能电容的选配也是很关键的一个条件，为

确保热敏电阻器能够安全的起到保护电路的作用，所以要求电源设计厂家也应该充分

考虑这一因素。

When the power supply circuit for the thermistor is mainly used to suppress largeinrush

current at power-on, a large inrush current is the capacitor discharge, the filter to be

20D-15

Rev 2.0 :

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